Feed-stop for lathes.



C. KELLER. FEED STOP FOR LATHES. APPLICATION FILED 001.1. ma.

Patented Sept. 16, 1919.

2 SHEETS-SHEET I- a vv I...

c. KELLER. FEED STOP FOB LATHES. APPLICATION men ocrl 1. I918- Patented Sept. 16,1919.

2 SHEETS-SHEET 2.

cnAnLns KELLER, or new states, WISCONSIN.

rnnn-s'ror son nnrnns.

Specification of Letters Patent.

amina.

Patented se t. 1c, 1919.

Application filedOctober 1,1918. Serial No. 256,487.

The invention is lllustrated in the accompanying drawings and will be hereinafter fully described, the novel features being subsequently pointed out in the ap pended claims.

In the drawings--- Figure 1 is a perspective view of my stop device showing it applied to control the feeding of a. tool working in the bore of a tube or pipe;

Fig. 2 is an enlarged line l2 of Fig. 1;

Fig 3 is a view similar to Fig. 1 but showing the device arranged to control the feed of a tool operating e'xteriorly upon the work;

Fig. f is a detail plan view, partly in section of the improved attachment.

The lathe may be of any desired size, form or construction and in itself forms no part of my invention, the accompanying drawings showing a well-known form of l: ..the con'qn'ising a frame 1 and a carriage f2- mounted for longitudinal movement upon the frame. The cutter or other tool 3 is supported upon a. transverse carriage 4: which is mounted upon the carriage 2 and is slidable transversely of the same, the said transverse carriage being shifted relative to the main carriage 2 by a worm or feed screw provided at the front of the lathe with a hand wheel or other form of turning member 5.

ln carrying out my invention, I employ a stop rod or bar 6 which is provided at one end with an eye 7 adapted to engage over a stud S on the feed carriage 4;. This stop bar or *od is supported and guided by a bracket or stop plate 9 secured by a screw 10 to the longitudinally moving carriage 2, the drawing showing the stop plate 9 as having a vertical notch 11 in its upper end or edge and the bar or rod 6 resting on the base of said detail section on the .notch. A stop sleeve 12 is fitted upon the stop rod or bar 6 and is adapted to frictlonally engage the same, the said sleeve being split and provided with lugs or cars 13 and a bolt 14]; beingmounted in one of said lugs or cars and having its threaded extremity projecting above the other lug or ear. A nut 15 is mounted upon the bolt 1% and bears upon the upper lug or earl8 and it will be readily understood that when the sa1d nut is turned home the lugs or cars 13 will be forced together so that the stop sleeve 12will be frictionally clamped about the stoprod or bar. Buifer rings or collars 16 may be fitted upon the stop b. r or red 6 against the ends of the sleeve 12, as shown.

It Is thought the operation of the device willbe readily understood. The cross feed carriage 4: is adjusted so that the tool will be set to make the first out after which the frictional sleeve 12 and the buffers 16 are moved along the stop rod so that one of'said buffers will abut firmly against the stop plate 9, after which the nut 15 is turned home so as to clamp the sleeve about the stop rod whereby the engagement of the sleeve or tlte buffer collar against the stop plate 9 will hold the stop rod (5 and the carriage t unless force be applied through the hand wheel The tool will thus be held steady while the first cut is being made. When the out has been completed the hand wheel 5 will be manipulated so as to back the tool out and away from the work, this movement of the cross feed carriage causing a corresponding movement of the stop sleeve and the parts immediately adjacent thereto so that they will be disengaged from the stop plate. The carriage Jris then adjusted in the usual manner to set the tool for the second cut and this forward movement of the carriage will be free and easy until the friction sleeve or buffer ring again abuts the stop plate 9, the operatorimmediately feel.- ing the contact as is obvious. If force be then applied to the hand wheel 5, the stop rod 6 will be drawn through the friction sleeve and as this movement is resisted by the frictional engagement of the sleeve, it will be necessarily slow so that the operator will have ample time to closely observe the adjustment of the cutter or other tool and, consequently, will not be apt to move the same beyond the proper distance.

The attachment may be used in connection with either internally or externally operating tools and in Fig. 1 is shown arranged for use in connection with any internal cutter in which case it abuts against the rear side Fig. 3 it is shown in advance of the stop plateand is thereby. adapted for. use in .con-, nection with an external cutter. The device is exceedingly simple andmay be produeed and applied to any lathe at a trifling cost.

Having thus described myinvention, What is claimed as new is:

1-. An attachment for lathes comprising a stop plate, a stop rod adapted-to be. secured to the cross-feed carriage of a lathe and slidab'ly resting upon the I stop plate, and a slip stop sleeve adjustably secured'upon the stop rod and adaptedto ii-n-p ingeagainst the stop plate.

2. An attachment for lathes comprising a stop plate to be securedto the longitudinally traveling carriage of=thelathe5 a stop bar to be securedat one end to the cross-feed carriage of the lathe and slide upon the copies otthiapatent, may be obtained forufiveg cents each; tam-addressing the Commissioner of the stop plate 9, While in;

stop plate having a notch in stop plate, a slip sleeve mounted upon the stop rodinpositiontoimpinge against said step plate, and means for frictionally seeuri-ng said stop sleeve to the stop bar.

3. An attachment for lathes comprising :1 its upper edge and adapted to be secured to the longitudinal carriage-of alathe, a stop bar pivoted at one end to the cross-feed carriage of the lathe and slidably engaging the notch in the stopplate, a split sleeve fitted upon the stop bar, and mean-smounted in the memhers of the split sleeve to frietionally clamp the same-upon the stop bar.

4. An attachment for lathes comprising ail-abutment, a stop-rod-movable in the direction of its length upon the abutment, and a slipstop member held frictionally on the stoprod in position to cooperate with the abutment.

In testimony whereof I aili'x mysignature.

CHARLES KELLER. 11.8.

of Patents,

Washington; 1). Cd 

